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Discussion Starter · #1 ·
We have a unique problem with our 2004 Hyundai Sonata. When it's hot weather and the car is parked on concrete or asphalt, the car sputters upon takeoff. It also sputters and doesn't seem to want to go in the 40 to 50 mph range. If the car has not been parked on concrete or asphalt it doesn't do this. Has anyone else had this issue? Any suggestions as to the cause of this problem would be greatly appreciated.
 

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Hows your car idling when you come across this? and how hot are we talking here? Depending on how hot it is your car could be suffering from heat soak. Do you only notice this when you take off from a stop?
 

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Discussion Starter · #3 ·
It idles fine. It usually happens when the temperature outside in the mid 80's or higher.

It also happens when the car is in the 40 to 50 MPH range.
 

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Discussion Starter · #4 ·
This usually starts when the car has been sitting on concrete or asphalt and has NOT been run at all and the outside air temperature is pretty high.
 

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Could me a multitude of problems. With motors today there are so many electronics that monitor different aspects of the engine. if any of these read incorrectly it could spudder. Any check engine light? I'd ask Hyundai.
 
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